Nokia N75 - Manual (Page 4)

Insert the SIM card and battery
Keep all SIM cards out of the reach of small children.
Always switch the device off, and disconnect the charger
before removing the battery.
1 With the back of the device facing you, press the
release button (1), and slide off the cover (2).
2 Slide the SIM card into the holder until it clicks. Make
sure that the bevelled corner on the card is facing the
left side of the device and that the contact area on
the card is facing down.
3 Insert the battery.
4 Replace the back cover.